Study on the Mechanism of Subsidence into the Underground Cavity in OHYA Quarries.

OHYA 采石场地下洞穴沉降机理研究。

• 批准号: 04452223
• 负责人: YOKOYAMA Yukimitsu
• 金额: $ 3.07万
• 依托单位: Utsunomiya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04452223/
• 关键词: Geomechanics; Rock mechanics; Miocene pumiceous welded tuff; Depositted Soft Rock; Underground qarry; Underground Cavity; Room and Pillar Mining; Subsidence; Cave-in; Creep; Earth Tidal Force; 乾湿履歴; 地球潮汐

1. OHYA-stone has so large void ratio as the aluuvial sand, and could be regarded as heavily overconsolidated soil rather than rock.2. Dry and wet history affects the strength of the stone.3. The creep characteristics is as same as the cement concrete, and 60% of the ultimate strength may cause the creep failure of the pillars, which means the pillars could suffer the successive collapse due to creep failure and leads to cave-in the extensive area.4. Good relations between the earth tidal force and the occurrence of accidents such as cave-in and rock-fall are stochastically recognized.5. Roof slab lost many pillars may cause cave-in triggered by earth tidal forces, abrupt drop of atmospheric pressure, and rain fall.

1. OHYA-stone具有与冲积砂一样大的空隙比，可视为重度超固结土而非岩石。干湿历史影响石材的强度。其蠕变特性与水泥混凝土相同，达到极限强度的60%时可能导致矿柱发生蠕变破坏，即矿柱可能因蠕变破坏而发生连续破坏，导致大面积塌落。土潮汐力与塌方、落石等事故的发生有很好的关系。屋面板失去多根柱子可能会在潮汐力、大气压力骤降和降雨的作用下引起塌方。

项目成果

Okada, et al.: "Safty-Evaluation of Large Underground Space" Abstract of 45th Conf.JSCE. III-224. 484-5 (1990)

Okada 等人：第 45 届 JSCE 会议摘要“大型地下空间的安全评估”。

Yokoyama, et al.: "Effect of Dry-wet History on the Strength of Depositted Rock" Abstract of 27th Geotechical Conf., JSSMFE. 527. 1405-6 (1993)

Yokoyama 等人：“干湿历史对沉积岩强度的影响”第 27 届岩土工程会议摘要，JSSMFE。

横山幸満・上野勝利: "大谷地区空洞の陥没に関する二三の考案" 土木学会第47回年次学術講演会講演概要集. III. 640-641 (1992)

Yukimitsu Yokoyama 和 Katsutoshi Ueno：“关于大谷地区空洞倒塌的一些想法”日本土木工程师学会第 47 届年度学术会议摘要 III 640-641。

Yokoyama, et al.: "Some Aspects on the Subsidence of OHYA Quarry Area" Abstract of 47th Conf.JSCE. III-300. 640-1 (1992)

Yokoyama等人：“OHYA采石场沉降的一些方面”第47届JSCE会议摘要。

横山 幸満・上野 勝利: "大谷地区空洞の陥没に関する二三の考察" 土木学会第47回年次学術講演会講演概要集. III. 640-641 (1992)

Yukimitsu Yokoyama 和 Katsutoshi Ueno：“对大谷地区塌陷的一些思考”日本土木工程师学会第 47 届年度学术会议摘要 III 640-641。